Huawei SmartAX MA5600T Hardware Description page 631

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
Principles
Figure 3-117 Working principle of the H805VDSF board
Backplane
Control
board
-48V
DC
power
The H805VDSF board mainly consists of these functional modules: control module,
forwarding module, interface module, power module, and clock module. The basic principles
are described as follows:
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The service processing flow is as follows:
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Issue 24 (2018-07-30)
H805VDSF
GE
Forwarding module
Interface
module
Control
module
Power
module
Voltage required
by the board
Service Control
signal signal
The control module loads the board software, controls the running, and manages the
whole board.
The protection module protects and isolates the board from lightning strikes. The DC
block isolates the direct current. The protector protects the high voltage.
The forwarding module supports conversion between ATM/PTM services and IP
services, and also supports flow control and scheduling.
The interface module provides the ports for information exchange.
The power module supplies power to each functional module of the board.
The clock module provides clock signals for each functional module of the board.
In the upstream direction, the interface module converts the VDSL2 signals into a cell
flow, aggregates the flow to the forwarding module, and then reorganizes the cell flow
into ATM/PTM packets. The forwarding module encapsulates the reorganized
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Front panel
Protection module
DC
Protector
block
Clock
module
Clock required
by the board
Power
signal
3 Board
VDSL
over
POTS
VTU-R
xDSL
POTS
PSTN
Clock
signal
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